Earthquake · reviewed by a seismologist
M 1.6ml
26 km NW of Saint John, Canada
Yes. A magnitude 1.6 earthquake was recorded 26 km NW of Saint John, Canada, at 12:25 am EDT on 20 October 2023 (04:25 UTC), 5.5 km deep.
- When
- Magnitude
- M 1.6 (ml)
- Depth
- 5.5 km below the surface
- Felt
- no reports yet
- Nearest
- Washington County, 117 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1053 days ago
Earthquake alerts for Eastport, ME
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 5 km (3 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
How big was it?
This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.6 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
Where
Epicentre 45.4467, -66.2752. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Washington County, ME | 117 km (73 mi) | WSW | earthquakes near Washington County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
5 earthquakes have been recorded within 50 km since this one.
- 1.9 13 km W of Hampton, Canada
- 2.2 22 km ENE of Oromocto, Canada
- 1.6 11 km WNW of Saint John, Canada
- 2.3 11 km SSE of Wells, Canada
- 2.1 19 km NNW of Hampton, Canada
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.